1504 COXTRIBUTIOXS FROM THE NATIONAL HEEBARIUM 



8. Baccharis heterophylla H. B. K. Nov. Gen. & Sp. 4: 62. 1820. 



San Luis Potosi and Tepic to Oaxaca and Yiicatdn; type from Guanajuato. 

 Guatemala. 



Much-branched glutmous shrub, 0.6 to 2.5 meters high, densely leafy; leaves 

 oblanceolate or elliptic-oblanceolate to cuneate-obovate, mostly 2 to 5.5 cm. 

 long, 3 to 20 mm. wide, few-toothed or sometimes entire, l-nerved or faintly 

 triplinerved; other characters as in B. conferta. "Jara" {Langlasse); "esco- 

 billa" (Valley of Mexico). 



9. Baccharis vaccinioides H. B. K. Nov. Gen. & Sp. 4: 50. 1820. 

 Southern Mexico; type from Mordn. Guatemala. 



Similar to B. heterophylla; leaves elliptic or oval, 1 to 2.5 cm. long, 6 to 10 mm. 

 wide, acute, entire or "rarely 1-toothed on each side," l-nerved. 



10. Baccharis lancifolia Schlecht. Linnaea 9: 266. 1834. 

 Veracruz and Puebla; type from Jalapa, Veracruz. 



Similar to B. vaccinioides; leaves elliptic, 3.5 to 6 cm. long, 1 to 2 cm. wide, 

 l-nerved. "Meste" (Chiapas, <Seier). 



11. Baccharis sergiloides A. Gray in Torr. U. S. & Mex. Bound. Bot. 83. 1859. 

 Sonora. California and Nevada to Arizona; type from the Gila or Colorado 



River, Arizona. 



Suffrutescent, glutinous, up to 1.6 meters high, the very numerous erect 

 branches strongly striate-angled; larger leaves cuneate or cuneate-obovate, about 

 2.5 cm. long, 3 to 8 mm. wide, entire, somewhat venose, mostly deciduous, those 

 of the branchlets mostly linear or scale-like; heads very numerous, naked-panicu- 

 late; achenes glabrous, 10-nerved; pappus about 3 mm. long; receptacle pale- 

 aceous, at least in the pistillate heads. 



12. Baccharis raniiflora A. Gray, Proc. Amer. Acad. 15: 33. 1879. 

 Baccharis ramiflora squarrulosa A. Gray, Proc. Amer. Acad. 15: 33. 1879. 

 San Luis Potosi. 



Glutinous shrub, 1 meter high or less; stem leaves oblanceolate or linear- 

 oblanceolate, 1.8 to 7.5 cm. long (including the petioliform base), 2 to 5 mm. 

 wide, entire, obscurely triplinerved, those of the branchlets chiefly narrowly 

 linear-spatulate, crowded; branchlets 1 -headed, sometimes racemosely arranged on 

 the branches; involucre 3 to 6 mm. high, the phjilaries obtuse or acutish; achenes 

 8-nerved, obscurely glandular-scabridulous; pappus brownish-tinged, 5 mm. 

 long. 



13. Baccharis macrocephala Schultz Bip.; Greenm. Proc. Amer. Acad. 35: 

 575. 1899. 



Distrito Federal to Veracruz; type from Veracruz. 



Glutinous shrub, about 60 cm. high; stem leaves oblanceolate or elliptic, 2 to 

 3 cm. long, 3 to 6 mm. wide, with usuall}- reflexed apex, l-nerved, entire, decidu- 

 ous, those of the flowering branchlets smaller, densely crowded; branchlets 

 monocephalous, virgately arranged; heads subglobose, 9 to 14 mm. high, 10 to 

 17 mm. thick; achenes 8-nerved, somewhat glandular; pappus 1 cm. long, slightly 

 exceeding the styles. 



14. Baccharis palmeri Greenm. Proc. Amer. Acad. 41: 259. 1905. 

 Known only from the type locality, vicinity of Durango, Durango. 

 Suffruticose, 20 to 30 cm. high, several-stemmed, glandular-viscid, very leafy; 



larger leaves oblanceolate or oblong-elliptic, 1.5 to 2.8 cm. long, 3 to 8 mm. wide, 

 l-nerved or weakly triplinerved, entire; heads in clusters of 3 to 5 at tips of branch- 

 lets, short-pediceled or subsessile; involucre about 3-seriate, 6 to 7 mm. long, 

 the phyllaries acute; achenes essentially glabrous, about 8-nerved; pappus 12 mm. 

 long. 



